Kieron of SCS Astro Limited (Somerset) has helped me out yet again – this time with an extremely good price on a pair of 52mm Hutech IDAS light pollution filters.  Thank you very much Kieron 🙂  Why 52mm?  Because the camera rotator on the Sky 90 actually comes with a very handy 52mm filter thread.  Unfortunately I don’t seem to be able to source narrowband filters in 52mm mounted diameter.

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3 Responses to “Kieron sponsors the mini-WASP array – again :)”
  1. Tom How says:

    Is it not possible to get a 50mm to 52mm converter ring?

  2. Greg Parker says:

    Yep – but that doesn’t help the vignetting too much 🙂

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